The application of membrane bioreactor (MBR) technology has grown exponentially in terms of number of plants and capacity over the past decade. Earlier applications of MBR technology was directed mainly for water reuse and recycling applications. More recently the types of applications
have grown significantly to include advanced nutrient removal for direct discharge into sensitive receiving water bodies and upgrade of aging infrastructure to increase capacity as well as effluent quality. There is a growing interest in enhanced biological nutrient removal (EBNR) using the
MBR technology to capitalize on the benefits of these two advanced technologies. Enhanced BNR and MBR is a unique combination since the enhanced BNR process provides excess phosphorous accumulation in the biomass and the MBR process provides excellent solids-liquid separation which ensure
virtually no solids in the treated effluent.The Cauley Creek ZeeWeed® MBR plant was expanded from 2.5 mgd to 5.0 mgd and converted from a chemical P removal process to enhanced biological phosphorous removal process. Modeling and simulation using BioWin showed that a modified Johannesburg
configuration was the preferred approach. The expanded plant was commissioned in fall 2004 and has been meeting all effluent discharge limits over the past two years with significantly lower ferric and caustic consumption. The results over the first two years of operation showed that the dosages
for both ferric chloride and caustic were reduced by 60% as compared to chemical P removal during Phase I. The plant consistently achieved effluent TP of 0.1 mg/L or less, effluent ammonia-N of 0.2 mg/L, and effluent TN of 4–5 mg/L.

No Reference information available - sign in for access.

No Citation information available - sign in for access.

No Supplementary Data.

No Data/Media

No Metrics

Document Type: Research Article

Publication date: 2007-01-01

More about this publication?

Proceedings of the Water Environment Federation is an archive of papers published in the proceedings of the annual Water Environment Federation® Technical Exhibition and Conference (WEFTEC® ) and specialty conferences held since the year 2000. These proceedings are not peer reviewed. A subscription to the Proceedings of the Water Environment Federation includes access to most papers presented at the annual WEF Technical Exhibition and Conference (WEFTEC) and other conferences held since 2000. Subscription access begins 12 months after the event and is valid for 12 months from month of purchase. A subscription to the Proceedings of the Water Environment Federation is included in Water Environment Federation (WEF) membership.

WEF Members: Sign in (right panel) with your IngentaConnect user name and password to receive complimentary access. Access begins 12 months after the conference or event